1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f036d70957c1a257ac66e151ec0ca415e9b9ef8d63ad477df636a4350a63af. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df64fd6f-55e5-4047-848f-56368c622369.json and https://artists.proofprofile.net/proofs/artist/df64fd6f-55e5-4047-848f-56368c622369.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2070cad576e2dd64d6a8213ca26f81da6d2a7904811fc72794a652c58a377cd4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD20710459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb52fa4e317be113f17151bfff3647c44b8caedf8b7deac98add35a641cb480d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD20710461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81fb1c43221090b3b044d4fe9a89b2b0b5bd8f8fc5b19f241a41c17344a1205. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360800691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3727b2d72913712f275704fbbe0ea2f8206b1a52de4b14dec32c215dbc5e26. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360800693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca27243429c484b69e02cc82992138e61811a2eec803da7ed27dfe072a4f030b. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360800698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae8de5808a8cd65b364fb864d604954806f29acb9e2a18368aec6d58605642a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAAD20811209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52653678a806cb3602c033872d8d2782a6ede36e742b0856dbbb3b7824abe0f1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAAD20811210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78507f745d66a870fbf6f18cd6d16dd8540573495e3e1f61dcf067714edc7802. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAAD20811215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e0070b0e3fce6f62c79aafcac9bbf9031474a973a196c1a3e0f52f90181e92. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAAD20811222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec87da7572be687fdbe656e27ff3b75acc1518a4a4e64a6623cc41aaa47364c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360801089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447aa1da0d5141cdde3615e8ce3d08791ac88f7d10fb50eb05152f2152159bd9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360801090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8e87ad41793429bbce101d4f9f666b12a866a8f53d8648acd8e1777dce8c11. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360801091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4acd7ce322d3099cf6a778119933d5af77d9d06f936e39e1765099358b3037. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360801102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803a357bcaf917bce4026f331fdaf75297f635cbfb7fba114eba69a2d7fb351. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360801697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299dec2d61332352cd8f116f96dbe306a86ef4b0892e042d6c6a7953ec3b887e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360801698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fdb8c1866b3f3de64a5c33b4bbeec85a570f1037463b6f92964c5516a12898. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL360801704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47781f0087131ad363743eb73adc968ab3efb1b8164c4d60067728dc1bcf8e6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e86fe5625c3ed2d0e398c1497e047b1b6c9a337fba1882063fdab99cf5174a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e88df0be9eca309e5e0d8d767e4451ccabf905e52dfcfe2344017cda0db0cf6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5996f7b8757a91bd01b6290d9466c803628a60d686b666d2c36db2d13a01b72. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255b3804b550de9f21e61f14a638116d0a86746f2372b6b05e85cb478179aba8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab9ec3d8e240e36d6c290ebf4b3ac10e9fbeaa977ae064002ae6e70eb3bf5d6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63229e348b8017733a848132da4ca22e607364ee40e0d9447cc2bd4b92a56c3a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4281cd831d537978b7d866295f9f902145946357261bc4e67eab2ea766f009d9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb4604b304625c11756d87573ef78b9068f8aac981b602bb8e2d07db17d031a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8d42764c176d4a38b08c14e5eee3bdd9f5518283c693f3d6a2f5cdd2da90b3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402356.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0bcdb2968df6a618166372e2455f637fc188eb6679befb8534e3112f640f8c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f24763008251ae0c3d66701dc3d6efb18e9b682a8df8e84bcb680f903f11e5a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f2e9a87581210599ff2cd6715c5eb06adee4d4f0f70ee4aac649286d615d65. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa303649058167823ebf1be2615b8c0239afb1384f02299cbbb83009bbc9d5c68. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baa8a256e80d8ff46deeaebf0b989c7d9f6a2af4857829d5aac6ed7e4166025. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafac6577941d482e35fbd5baaff75a48681208092f8c69622aba30e557694599. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABY1402379.